Tree Lavatera

Lavatera olbia Fr: Lavatera olbia

A laxly branched shrub, to 2 m (at least; ours was about 2.5 m high).
Like L. olbia except: flowers are bigger, and not as separated at their base, flower stems are longer, leaves 3-lobed (not 5) and greener. The stems and leaves are felted when young

Although this is found along the western Mediterranean, it's really a local plant: "olbia" is the old name for Hyères. L. olbia is widely grown in gardens.